<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>	</title>
	<style>
		body {
			height: 3000px;
		}
		.one {
			margin: 10px 10px;
			width: 100px;
			height: 100px;
			background-color: pink;
			top: 10px;
			left: 10px;

		}
		.two {
			width: 100px;
			height: 100px;
			background-color: red;
			position: relative;
		}
		.son {
			width: 30px;
			height: 30px;
			background-color: blue;
			position: absolute;
			top: 50px;
			margin-top: -15px;
			left: 50px;
			margin-left: -15px;
		}

		span {
			background-color: gold;
			display: block;
			
			width: 100px;
			height: 100px;
		}
		
		.h {
			width: 100px;
			height: 100px;
			background-color: green;
		}
	</style>
</head>
<body>
	<div class="one"></div>
	<div class="two">
		<div class="son"></div>
	</div>
	<span>hahahahahah</span>
	<div class="h"></div>
</body>
</html>